Re: Not "divisive and discriminatory", but essential
I genuinely do not understand the opposition to being able to prove that you've had the vaccination. If people can't due to a genuine medical condition (fear of needles and believing what Eamonn Holmes says do not count), then issue them the certificate (or flag on the database or whatever) to say they've been vaccinated.
Time for people to take their place in society and do their bit to protect other people, by having their jabs. If you want to go to a concert, or the big sports event, you'll need to prove you're safe to be among thousands of other people.
Personally, I can't wait to get mine so that I can get on public transport, and go to shops, restaurants, shows, films, concerts and pubs again, and if someone sticking a needle in my arm is the price I pay for that, then so be it.